Improvement in wire-cloth for screening coal



J W. BRGCK.

Improvement in Wire Cioth for Screening Coal.

N0. 132,949. I Patented Nov.12,i872.

UNITED STATES ATENT OFFICE.

JOSEPH W. BROOK, OF SGRANTON, PENNSYLVANIA.

IMPROVEMENT IN WIRE-CLOTH FOR SCREENING COAL.

Specification forming part of Letters Patent No. 132,949, dated November12, 1872.

To all whom it may concern:

Be it known that I, JosEPH W. BROOK, of Scranton, in the county ofLuzerne and State of Pennsylvania, have invented a new and ImprovedWire-Oloth for Screening Coal; and I do hereby declare the following tobe a full, clear,-and exact description of the same, reference being hadto the accompanying drawing forming part of this specification, inwhich- Figure 1 is a plan view; and Figs. 2 and 3 are edge views of twovarieties of the invention.

Similar letters of reference in the accompanying drawing indicate thesame parts.

This invention belongs to that kind of wirecloths in which both the warpand filling are four-sided wires; in other words, square incross-section; and in which, therefore, each wire must be set either onits own side or on its edge. In such wire-cloth coal-screens as haveboth the warp and filling set on the side an amount of coal estimated atfive per cent. of the whole quantity passing through the screen isbroken into dust and therefore wasted by falling against the sides ofthe wires. This waste can be prevented by setting the wires on theiredges instead of their sides, thus causing them to present sharp ridgesto the coal instead of flat surfaces, as in the other case; but when thewires are thus set on edge the meshes between the wires are much moreapt to clog, because the sides of the wires stand inclined. This isespecially the case when the coal is wet, as it very frequently is. Myinvention has for its object to improve the construction of wire-clothcoalscreens in such a manner as to secure the advantages derivable bothfrom setting the wires on the edge and on the side, and to diminish in agreat measure the disadvantages attending both methods. To this end myinvention consists in wire-cloth having its warp set on the edge and itsfilling on the side, as I will now proceed to describe.

In the drawing, A are the warp-wires, and B the filling, the formerbeing set on their edges and the latter on their sides. The result ofthis arrangement is that the amount of flat surface against which thecoal has to fall and the consequent waste from pulverization is reducedone-half as compared with cloth having all its wires set on the side. Atthe same time the meshes, instead vof having four inclined sides, as inthe case of cloth having all its wires set on the edge, have only twoinclined sides, so that the liability to clog is also reduced one-half.

Having thus described my invention, what I claim is' As an article ofmanufacture, wire-cloth composed of four-sided wires, of which the warpis set on the edge and the filling on the side, substantially asspecified.

' J. W. BROOK.

Witnesses:

O. F. BROWN, N. K. ELLswoRTH.

